Steam-boiler.



Pat ented Nov. 25, I902;

c. m. am/mono. STEAM BOILER Application filed July 3 1902.)

\mb Modem CHARLES M. RAYMOND, on CLEVELAND, 01-110.

STEAM- BOILER.

SPEGIFIGATION forming part of Letters Patent No. 714,237, dated November 1902.

Application filed July 3,-1902. erial No. 114,233. lllo model.)

To ctZZ whom it may concern.-

Beit known that I, CHARLES M. RAYMOND, a citizen of the United States, residing at Cleveland, in the county of; Guyahoga-and State of Ohio, have invented certain new and useful Improvements inSteam-Boilers; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the. same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form a part of this specification.

This invention relates to steam-boilers of the water-tube type, in which the tubes are set in coils above a burner, and is particularly useful and applicable to engines for antomobiles or any other purpose where high efficiency in a small compass is required or skilled attendance lacking.

The object of the invention is to form an improved steam-generator in which the water is entered at an upper coil and the steam delivered from a lower coil or the hottestpart of the boiler.

A further object is to connect the various coils by risers, so that. although the general course of the water through the boiler is downward or toward the fire it must intermediately pass upwardly through one or more risers, forming traps, whereby the steam in the lower coil or coils is trapped fromthe water in the upper coils and cannot displacethe same or allow it to run down into the superheating or steam coils before it is forced there by the pump.

A further object is to trap the water so that it cannot draw or back out of the boiler, pocket steam, or admit air into the coils, since unless air or some other medium is admitted to upper coil or coils thewater or other liquid being vaporized cannot move downward without forming a vacuum in upper part of system.

A further object is to provide such a boiler with an improved header, in which mud and precipitates may collect and be blown out.

A further object is to generally simplify and improve the construction of such boilers.

With these and other objects in view the invention is hereinafter described,andis illustrated in the accompanying drawings, in

which- Figure 1 is a top plan Fig. 2is a side elevation. a coil of a modification. tion of the modification.

Referring specifically to the form shown in Figs. 1 and 2, the coils are indicated at 1, 2, 3, 1, 5, 6, 7, and 8, and they are formed into sets, each of which contains two coils which are substantially parallel and connected at the outer pipes by inclined pipes or risers (indicated at 1, 3, 5 and 7) between the respective coils of each set. The coils 1 and 2 form one set, 3 and 4 the next set, due. The inner end of the pipe forming the upper coil of each set-such coils being indicated at 1, 3, 5, and 7-connects downwardly with the inner end of the pipe forming the lower coil of the next set below, as 4, 6, and 8, except in case of the lowest set, the upper coil 7 of which connects to the steam-pipe 9.

The water is supplied to the lower coil 2 of the upper set by connection with the top of the header lO, to'which water is supplied by the feed-pipe 11, having the usual checkvalve 1l,which valve is preferably placed at a point lower than the bottom coil. Then, since the feed pipe is normally filled with water, should the pump or other feeding apparatus be disconnected or leak the column of water in said pipe will move downwardly and either form a vacuum at upper end or if air has access to lower coil it will force water upwardly, as is desirable. Theheader extends axially Within and through the coils and has at the bottom a blow-off cook 10*. The sets are joined by couplings 12. The feed-pipe is outside the casing'or jacket (indicated at 13) and is not exposed to the fire; otherwise a steam-pocket might form therein and force the contents of the upper coils down into the superheating-coils.

Any suitable burner may be located under the boiler, and naturally the steam will be generated in one or more of the lower coils nearest the fire and pressing on the surface of the water in some one of the riser-tubes connecting the coils will force contents downwardly in said tube or back toward its point of entrance to generator. It will be seen that the course of the water will be from the view of the coils. Fig. 3 is a plan of Fig. 4 is a side eleva- IOC header into the coil 2, thence into the coil 1, thence into the coil 4, thence to 3 6 5 8, &c. The heat is thus utilized to the greatest advantage, since losing its intensity as it rises it meets colder coils successively and more readily gives up its heat units. Thus it will be seen that temperature in uptake may economically be reduced to nearly that of feed.

Any of the sets may be removed without unshipping the boiler by unscrewing the couplings 12 and disconnecting the steam-' pipe. Other sets may be added in a similar manner, thus permitting variation in the size of the boiler as necessary or desired. The header with outlet at the top only allows the mud and precipitates to settle and prevents them being carried around the coils into the engine.

The risers referred to form traps, so that after water is forced into the boiler it will remain there and no air will enter, even though steam generation cease, check-valve leak, or feed-line be disconnected.

It is not essential that the coils be arranged in pairs, as shown, since an object of" the invention will be effected by any arrangement which contains one or more risers at least equal in height to the size of the tube to which it is connected, as it will thereby prevent air or steam from getting into the upper part of the boiler and displacing the Water and also prevent the water, except as desired and forced, from running down into the steam or superheating coils. An illustration of this form is shown in Figs. 3 and 4. It will be seen that each coil has its inner end raised, as at 1" 2 &c., which is extended at a tangent from its smaller diameter over itself, as at 1 2 3", &c., and connected to the outer end of the successively lower coil, which rises to meetit, the connection illustrated at 12 being an L, preferably of the type known as a drop L, having a plate or base or flange cast on and holes for bolts or other fastenings. In setting a generator of this type uprights sired number of are bolted or points, and the aforesaid Ls otherwise fastened to same, or

are erected at any dewhere a light construction is desired and sheet-metal casing employed the plates or flanges may be secured directly to it.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

l. A tubular boiler comprising a plurality of superposed sets of coils, each set having an upper and a lower coil, and a connection between the upper coil of one set and the lower coil of the next set below, substantially as described.

2. A tubular boiler comprising a plurality of superposed sets of coils wholly in difierent horizontal planes, each set having upper and lower coils, connections between the sets, and a riser connecting the upper and lower coil of a set.

3. A tubular boiler comprising a plurality of superposed sets of coils, each set having upper and lower coils and a connecting-riser, and a connection between the upper coil of one set and the lower coil of the nextset below.

4. A tubular boiler comprising a plurality of superposed coils and a connection between an upper and a lower coil which rises above said upper coil.

5. A tubular boiler comprising a plurality of superposed coils lying wholly in different horizontal planes connected by risers forming traps between the successive coils.

6. In a tubular boiler, in combination, a header having a water-inlet and a water-outlet at the top and a blow-oft at the bottom,

and coils around the header connected to the 7 said outlet.

7. In a tubular boiler, in combination, a header having a feed-water inlet, and a water-outlet at the top, and coils connected to the said outlet and conducting downwardly to the steam-pipe, but having intermediate risers therein.

In testimony whereof I affix in presence of two witnesses.

CHARLES M. RAYMOND.

Witnesses:

JOHN A. BOMMHARDT, LOTTIE NEWBURN.

my signature 

